台背，用作建筑用词，指桥台或涵洞一侧或两侧与主体路基衔接的一段路基。
砂砾是台背回填工程常用的回填材料之一。
The gravel is one of the most common materials for abutment backfilling.
高速公路构造物台背回填质量关系到高速公路整体质量。
The quality of freeway structure retailing backwall refilling concerns the freeway global quality.
如在路堤加筋、台背路堤填土加筋、岩石边坡路基防护和路面裂缝的防治等。
For example, it can apply to embankment reinforcement and embankment fill and rock slope defence and pavement crack prevention etc.
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